jQuery jAM, Season 6

	 
  var cx = document.querySelector("canvas").getContext("2d");
  var total = results.reduce(function(sum, choice) {
    return sum + choice.count;
  }, 0);

  var currentAngle = -0.5 * Math.PI;
  var centerX = 300, centerY = 150;

results.forEach(function(result) {
	var sliceAngle = (result.count / total) * 2 * Math.PI;
    cx.beginPath();
    cx.arc(centerX, centerY, 100, currentAngle, currentAngle + sliceAngle);
	
	var middleAngle = currentAngle + 0.5 * sliceAngle;
    var textX = Math.cos(middleAngle) * 120 + centerX;
    var textY = Math.sin(middleAngle) * 120 + centerY;
    cx.textBaseLine = "middle";
	
if (Math.cos(middleAngle) > 0)
    cx.textAlign = "left";
  else
   	cx.textAlign = "right";
   	cx.font = "15px sans-serif";
   	cx.fillStyle = "black";
    cx.fillText(result.name, textX, textY);
	
	currentAngle += sliceAngle;
    cx.lineTo(centerX, centerY);
    cx.fillStyle = result.color;
    cx.fill();
});